Integrate CAN controller and implement switches interrupt

programs/can_test.prog_

@@ -0,0 +1,71 @@
+reset:
+    br always >main
+    nop
+
+hardfault:
+    reti
+    nop
+
+memfault:
+    reti
+    nop
+
+timer_interrupt:
+    reti
+    nop
+
+can_interrupt:
+    br >can_interrupt
+    nop
+
+.align
+led_addr: .word 0x000F0000
+
+timer_counter_addr: .word 0x000F0008
+timer_status_addr: .word 0x000F000C
+
+dmem_start_addr: .word 0x00000400
+dmem_end_addr: .word 0x000004FC
+
+priority_mask: .word 0xFFFFFF03
+
+timer_target_value: .word 127 // for simulation
+// timer_target_value: .word 0xF10000 // for real board
+
+can_base_addr: .word 0x000F0100
+
+can_control_ptr: .word =can_base_addr
+can_command_ptr: .word =can_base_addr + 1
+can_acceptance_code_ptr: .word =can_base_addr + 4
+can_acceptance_mask_ptr: .word =can_base_addr + 5
+can_acceptance_bus_timing0_ptr: .word =can_base_addr + 6
+can_acceptance_bus_timing1_ptr: .word =can_base_addr + 7
+can_output_control_ptr: .word =can_base_addr + 8
+can_identifier0_ptr: .word =can_base_addr + 10
+can_identifier1_ptr: .word =can_base_addr + 11
+can_data0_ptr: .word =can_base_addr + 12
+can_data1_ptr: .word =can_base_addr + 13
+
+main:
+    // Initialize stack pointer to the end of the data memory
+    ldr r12, >dmem_end_addr
+
+    // Set runtime priority
+    ldr r0, >priority_mask
+    and r14, r0, r14
+
+    // Set LED to pattern
+    clr r2
+    addi r2, 0x7A
+    st08 r0, r2
+
+    // Initialize CAN
+    ldr r0, >can_acceptance_code_ptr
+
+loop:
+    br >loop
+    nop
+
+can_interrupt:
+    reti
+    nop

programs/interrupt_test.prog

@@ -0,0 +1,65 @@
+reset:
+    br always >main
+    nop
+
+hardfault:
+    reti
+    nop
+
+memfault:
+    reti
+    nop
+
+switches_interrupt:
+    br >switches_interrupt_handler
+    nop
+
+can_interrupt:
+    br >can_interrupt_handler
+    nop
+
+.align
+led_addr: .word 0x000F0000
+timer_counter_addr: .word 0x000F0008
+timer_status_addr: .word 0x000F000C
+dmem_start_addr: .word 0x00000400
+dmem_end_addr: .word 0x000004FC
+priority_mask: .word 0xFFFFFF03
+
+// timer_target_value: .word 127 // for simulation
+timer_target_value: .word 0xF10000 // for real board
+
+main:
+    // Initialize stack pointer to the end of the data memory
+    ldr r12, >dmem_end_addr
+
+    // Set runtime priority
+    ldr r0, >priority_mask
+    and r14, r0, r14
+
+    ldr r0,>led_addr               // LED addr
+    ldr r1,>timer_status_addr      // Timer addr
+    ldr r3,>timer_counter_addr     // Timer addr
+
+    // Set LED to pattern
+    clr r2
+    addi r2, 0x7A
+    st08 r0, r2
+
+    // Enable the timer...
+    ldr r2, >timer_target_value
+    st32 r3, r2
+
+    clr r2
+    addi r2, 0x1 // enable bit set
+    st32 r1, r2
+
+loop:
+    br >loop
+    nop
+
+timer_interrupt_handler:
+    // Set LED to pattern
+    clr r2
+    addi r2, 0x0C
+    st08 r0, r2

programs/scrolling.prog

@@ -12,11 +12,11 @@ nop
 scrolling_addr: .word 0x000F00A0
 scrolling_count_addr: .word 0x000F00A4
 
-scrolling_cnt_value: .word 0x20FC000 // for real board
-// scrolling_cnt_value: .word 0x500 // for simulation
+// scrolling_cnt_value: .word 0x20FC000 // for real board
+scrolling_cnt_value: .word 0x500 // for simulation
 
-w_cnt_top:  .word 0x3FC000 // for real board
-// w_cnt_top:    .word 0x100 //for simulation
+// w_cnt_top:  .word 0x3FC000 // for real board
+w_cnt_top:    .word 0x100 //for simulation
 
 pattern_ptr: .word =pattern1